Fuel tank return side block-off, for carbed 914s... Options

[DougC]

OK, I replacing a fuel cell with a stock fuel tank on a 914 that's got Webers. The stock tank has 2 ports at the bottom, one for feeding the engine and the other is a return. My understanding is that the return is not necessary for carbed engines..So, my question is how do I seal up this extra port on the bottom of the fuel tank? TIA..

Doug C

[ArtechnikA]

Where does it circulate back FROM, on a carbed car does it return from a fuel pressure regulator or someplace on the webers?

the 914.6 fuel pump, for instance, is a recirculating pump with a built-in regulator; one thing the recirculating feature does is continuously filter the fuel.

in a FI engine, pressuring the fuel heats it a bit, and in some race cars, a small heat exchanger is built into the return loop to reject heat to the airstream. i can't see this being a significant factor in a carbed car, but if you did have a way of making the fuel cool (e.g. cool can...) recirculating the fuel through that would be A Good Thing. last i checked, SCCA permitted a 1-qt cool can in at least some SOLO-II classes (Prepared and above, for sure...).